466 CHARLES S. PROSSER 



Ft. In. 



Limestone, with large wave-marks 6 



Limestone 6 



Clay, with a little thin limestone i 6 



Limestone with large wave-marks and containing large crinoid beads . . 6 



Lick Fork. — At least two ripple-marked layers in the upper 

 part of the Brassrield limestone occur on Lick Fork (called Lick 

 Creek on the Highway Map of Adams County) above and below 

 the highway bridge on the West Union and Jacksonville Pike, 

 about 2j miles northeast of West Union and about opposite the 

 house of J. Frank Young. Stratigraphically, what is apparently 

 the lowest ripple-marked layer outcrops a few rods above the 

 bridge, where there is a strong dip downstream. The rock of this 

 layer is a very crystalline and crinoidal limestone containing large 

 cup corals and numerous fragments of other fossils in its upper 

 surface. The ripple-marks are large and one of them runs N. 70 

 E., although some of them run perhaps more nearly east and west. 

 The crests of two of them are 30 inches apart, and of another set 

 31 inches apart. The trough is 3^ inches deep and the slope 

 much steeper on the southern than on the northern side. A few 

 rods below the bridge is a layer with ripple-marks which run N. 20 

 W. and S. 20 E. The crests of these ripple-marks are about 31 

 inches apart and the western slope is steeper than the eastern one. 

 This ripple-marked layer is about 19I feet higher than the base 

 of the Brassrield limestone. Not far above the highway bridge 

 are ripple-marks running N. 18 W. and S. 18 E., which apparently 

 occur in the same layer as those below the bridge, which have 

 just been described. Farther upstream the direction of the ripple- 

 marks, apparently on this same layer, has changed to N. 74 W. 

 Not much farther upstream than the ripple-marked layer first 

 described one is shown in the bed of the stream, which may be 

 higher than the others; but its stratigraphic position was not 

 certainly determined. The ripple-marks of this layer run north 

 and south, the crests are 30-35 inches apart, and there does not 

 appear to be a marked difference in the angles of the slopes. 



This is probably the locality where Professor John Locke noted 

 two waved layers in the Flinty limestone (Brassrield), No. Ill of .his 



